Understanding the Abdomen Anatomy
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Questions and Answers

What is the area occupied by the abdomen called?

  • Abdominal cavity (correct)
  • Pelvic brim
  • Parietal peritoneum
  • Thorax

In humans, the abdomen stretches from the thorax at the thoracic diaphragm to the pelvis at the _______.

  • Cephalothorax
  • Lumbosacral joint (correct)
  • Inferior vena cava
  • Ventral wall

What encloses the abdominal cavity in vertebrates?

  • Pelvic brim
  • Cephalothorax
  • Abdominal wall (correct)
  • Paravertebral muscles

What is the boundary of the abdominal cavity?

<p>Thoracic diaphragm (C)</p> Signup and view all the answers

What membrane lines both the abdominal and pelvic cavities?

<p>Parietal peritoneum (C)</p> Signup and view all the answers

What is the term for the part of the body between the thorax and pelvis in humans and other vertebrates?

<p>Abdominal cavity (C)</p> Signup and view all the answers

In arthropods, which part of the body follows the thorax or cephalothorax?

<p>Posterior tagma (D)</p> Signup and view all the answers

What structure connects the abdominal and pelvic cavities in vertebrates at the back?

<p>Lumbosacral joint (B)</p> Signup and view all the answers

Which membrane lines the organs within the abdominal and pelvic cavities?

<p>Parietal peritoneum (C)</p> Signup and view all the answers

What is the edge of the pelvic inlet called, stretching from the lumbosacral joint to the pubic symphysis?

<p>Pelvic brim (C)</p> Signup and view all the answers

What is the main function of the mesentery?

<p>Storing fat and allowing blood vessels, lymphatics, and nerves to supply the intestines (B)</p> Signup and view all the answers

How was the mesocolon previously thought to be structured?

<p>As a fragmented structure with separately terminating parts (C)</p> Signup and view all the answers

What is the shape and direction of the root of the mesentery?

<p>Narrow and obliquely directed from the duodenojejunal flexure to the right sacroiliac joint (B)</p> Signup and view all the answers

Where does the root of the mesentery extend to?

<p>From the duodenojejunal flexure to the ileocaecal junction (B)</p> Signup and view all the answers

Where is the small intestine located in relation to other structures in the abdominal cavity?

<p>Centrally, behind the transverse colon and greater omentum (B)</p> Signup and view all the answers

Flashcards

Abdominal Cavity

The space within the abdomen that houses various organs.

Thoracic Diaphragm

The flexible structure separating the chest cavity from the abdominal cavity.

Parietal Peritoneum

The membrane lining the inside walls of the abdominal and pelvic cavities.

Lumbosacral Joint

The joint that connects the lower back (lumbar spine) to the pelvic bone.

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Abdominal Wall

The outer layer of the abdomen, composed of muscles, fascia, and skin.

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Pelvic Brim

The curved edge of the pelvic inlet, separating the abdominal cavity from the pelvic cavity.

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Mesentery

The fold of peritoneum that attaches the small intestine to the back wall of the abdominal cavity.

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Root of the Mesentery

The root of the mesentery extends from the duodenojejunal flexure, where the small intestine joins the large intestine, to the ileocaecal junction, where the small intestine meets the large intestine.

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Small Intestine Location

The region located behind the transverse colon (part of the large intestine) and greater omentum (a fatty fold of peritoneum).

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Structure of the Mesentery

The arrangement and organization of the mesentery, previously thought to be fragmented but now understood as a continuous structure.

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Mesentery Functions

The main function of the mesentery is to hold the small intestine in place, provide passage for blood vessels, lymphatic vessels, nerves, and store fat.

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Root of the Mesentery Shape & Direction

The direction and shape of the mesentery's root, extending from the duodenojejunal flexure to the right sacroiliac joint.

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Posterior Tagma

The body segment that follows the thorax or cephalothorax in arthropods.

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